Absorbent articles comprising stretch laminates

Abstract

An absorbent article includes a chassis comprising a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet, and at least one elastically elongatable panel joined to the chassis. The elastically elongatable panel includes a stretch laminate having layers that are joined by ultrasonic bonding. The stretch laminate has at least one cover layer, an elastomeric film attached to the cover layer, the elastomeric film having two surfaces and a skin on at least one of the surfaces. The stretch laminate has at least one anchoring zone and at least one stretch zone. A portion of the skin is located in the anchoring zone and has a plurality of wrinkles, and the wrinkles have furrows.

What is claimed is: 
     
       1. An absorbent article comprising:
 a chassis comprising:
 a front waist region, a back waist region, and a crotch region positioned intermediate the front waist region and the back waist region; 
 a topsheet; 
 a backsheet; 
 an absorbent core disposed between the topsheet and the backsheet; and 
 an elastic waist feature in the back waist region; and 
 
 at least one elastically elongatable panel joined to the chassis, wherein the elastically elongatable panel comprises a stretch laminate having layers joined by ultrasonic bonding and comprises:
 at least one cover layer; and 
 an elastomeric film attached to the cover layer, the elastomeric film having two surfaces and a skin on at least one of the surfaces, 
 wherein the stretch laminate has at least one anchoring zone and at least one stretch zone, 
 wherein the stretch zone is elastically extensible along a stretch direction, wherein at least a portion of the skin of the elastomeric film is located in the anchoring zone, and 
 wherein the portion of the skin has a plurality of wrinkles and the wrinkles have furrows. 
 
 
     
     
       2. The absorbent article of  claim 1 , wherein the elastomeric film comprises a polyolefin elastomer, and wherein the anchoring zone is not elastically extensible along the stretch direction. 
     
     
       3. The absorbent article of  claim 1 , wherein the elastomeric film is a blown film. 
     
     
       4. The absorbent article of  claim 1 , wherein the elastomeric film is between about 20 μm and about 60 μm thick. 
     
     
       5. The absorbent article of  claim 1 , wherein the skin comprises a polyolefin selected from the group consisting of: metallocene polyethylene, low density polyethylene, high density polyethylene, linear low density polyethylene, very low density polyethylene, a polypropylene homopolymer, a plastic random poly(propylene/olefin) copolymer, syndiotactic polypropylene, metallocene polypropylene, polybutene, an impact copolymer, a polyolefin wax, and combinations thereof. 
     
     
       6. The absorbent article of  claim 1 , wherein the elastomeric film is attached to the cover layer with a peel force, as measured by the T-Peel Test, of 0.5N or more. 
     
     
       7. The absorbent article of  claim 1 , wherein the elastomeric film has a % set, as measured by the Hysteresis Test, of 30% or more. 
     
     
       8. The absorbent article of  claim 1 , wherein the absorbent article is a taped diaper. 
     
     
       9. The absorbent article of  claim 1 , wherein the anchoring zone is attached to the chassis or a fastener. 
     
     
       10. An absorbent article comprising:
 a chassis comprising a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet; at least one elastically elongatable panel joined to the chassis; and a fastener attached to the at least one elastically elongatable panel, 
 wherein the elastically elongatable panel comprises a stretch laminate comprising layers attached by ultrasonic bonding and comprises:
 a first cover layer; 
 a second cover layer; and 
 an elastomeric film disposed between the first cover layer and the second cover layer, the elastomeric film having a first skin on a first surface closest to the first cover layer and a second skin on a second surface closest to the second cover layer, wherein the stretch laminate has at least one anchoring zone and at least one stretch zone, 
 wherein the stretch zone is elastically extensible along a stretch direction, 
 wherein at least a portion of first skin is located in the anchoring zone and the portion comprises a plurality of wrinkles, and 
 wherein the wrinkles have furrows. 
 
 
     
     
       11. The absorbent article of  claim 10 , wherein at least a portion of the second skin is located in the anchoring zone and the portion comprises a plurality of wrinkles. 
     
     
       12. The absorbent article of  claim 10 , wherein the elastomeric film comprises a polyolefin elastomer. 
     
     
       13. The absorbent article of  claim 12 , wherein the polyolefin elastomer is a propylene based homopolymer or co-polymer, or ethylene based homopolymer or co-polymer selected from the group consisting of: an elastic random poly(propylene/olefin) copolymer, an isotactic polypropylene containing stereoerrors, an isotactic/atactic polypropylene block copolymer, an isotactic polypropylene/random poly(propylene/olefin) copolymer block copolymer, a stereoblock elastomeric polypropylene, a syndiotactic polypropylene block poly(ethylene-co-propylene) block syndiotactic polypropylene tri-block copolymer, an isotactic polypropylene block region-irregular polypropylene block isotactic polypropylene tri-block copolymer, a polyethylene random (ethylene/olefin) copolymer block copolymer, a reactor blend polypropylene, a very low density polypropylene, a metallocene polypropylene, metallocene polyethylene, and combinations thereof. 
     
     
       14. The absorbent article of  claim 10 , wherein the elastomeric film is a blown film. 
     
     
       15. The absorbent article of  claim 10 , wherein the elastomeric film is between about 20 μm and about 60 μm thick. 
     
     
       16. The absorbent article of  claim 10 , wherein the first skin and second skin comprise a polyolefin selected from the group consisting of: metallocene polyethylene, low density polyethylene, high density polyethylene, linear low density polyethylene, very low density polyethylene, a polypropylene homopolymer, a plastic random poly(propylene/olefin) copolymer, syndiotactic polypropylene, metallocene polypropylene, polybutene, an impact copolymer, a polyolefin wax, and combinations thereof. 
     
     
       17. The absorbent article of  claim 10 , wherein the elastomeric film is attached to the cover layer with a peel force, as measured by the T-Peel Test, of 0.5N or more. 
     
     
       18. The absorbent article of  claim 10 , wherein the elastomeric film has a % set, as measured by the Hysteresis Test, of 30% or more. 
     
     
       19. The absorbent article of  claim 10 , wherein the absorbent article is a diaper. 
     
     
       20. The absorbent article of  claim 10 , wherein the anchoring zone is attached to the chassis or a fastener.